England will add Thailand and Montenegro to its "red list" of destinations that require travellers to quarantine in a hotel on their return, the government said.
Canada, Denmark, Finland, Lithuania, Switzerland, Liechtenstein and the Azores would be added to England's "green list" of places that are safe to visit without requiring quarantine on return.
All changes to the lists will come into effect at 0400 (0300 GMT) on Monday 30 Aug., the government said.
(Reporting by Andrew MacAskill; Editing by Alex Richardson and David Gregorio)
